Can I use
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Object RTC (ORTC) API for WebRTC

- OTHER

Enables mobile endpoints to talk to servers and web browsers with Real-Time Communications (RTC) capabilities via native and simple JavaScript APIs

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Edge

  1. 12: Not supported
  2. 13 - 18: Supported
  3. 79 - 89: Not supported
  4. 90: Not supported

Firefox

  1. 2 - 86: Not supported
  2. 87: Not supported
  3. 88 - 89: Not supported

Chrome

  1. 4 - 89: Not supported
  2. 90: Not supported
  3. 91 - 93: Not supported

Safari

  1. 3.1 - 13.1: Not supported
  2. 14: Not supported
  3. TP: Not supported

Opera

  1. 9 - 72: Not supported
  2. 73: Not supported

Safari on iOS

  1. 3.2 - 13.7: Not supported
  2. 14: Not supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 89: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 62: Not supported

Chrome for Android

  1. 89: Not supported

Firefox for Android

  1. 86: Not supported

UC Browser for Android

  1. 12.12: Not supported

Samsung Internet

  1. 4 - 12.0: Not supported
  2. 13.0: Not supported

QQ Browser

  1. 10.4: Not supported

Baidu Browser

  1. 7.12: Not supported

KaiOS Browser

  1. 2.5: Not supported

ORTC is often dubbed WebRTC 1.1. It is possible to make ORTC communicate with WebRTC 1.0 endpoints. See WebRTC 1.0 for support details for that API.

Resources:
Bringing Interoperable Real-Time Communications to the Web